CNN CNN Newsroom July 5, 2013 17:41:00
>> who did you talk with? >> i talked to my previous friend in washington state. >> who is that please? >> dr. brooks. >> is that the last name? >> yeah. >> is this person a toxicologist? >> he's a biologist. he's one of the best of low dose radiation effect in the world. i work with him for many years. >> you consulted with dr. brooks about the issue of toxicology? >> yes. >> did you review studies where research was done on the intoxicating effects or the impairment effects of marijuana at various levels?